| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing a cellulose acylate film with less display unevenness and in which the light leakage brought about with the lapse of time is suppressed, and to provide a cellulose acylate film produced using the production method. <P>SOLUTION: The method for producing a cellulose acylate film comprises, in which Rth/Re is 0.8-3.5 when in-surface retardation of the film is Re(nm) and the retardation in the thickness direction is Rth(nm), a process D0 in which the separated cellulose acylate film, after casting dope containing the cellulose acylate having a specific degree of substitution, is conveyed, a process A of grasping the ends of the width of the film, and a process B of stretching the film in the width direction, in which the amount of a residual solvent at the start of stretching is 90-5% by mass. <P>COPYRIGHT: (C)2007,JPO&INPIT |
